Cepstral Engine

Voice Tag Attributes

<gender>

This attribute is supported.

AT&T Natural Voices, Cepstral Engine
RealSpeak Engine
Amazon Polly
AT&T Natural Voices, Cepstral Engine

This attribute works fine for these speech engines.

RealSpeak Engine

The gender attribute should not be used if the name attribute is already being used for the <voice> tag.

Amazon Polly

This attribute is not supported.

<age>

This attribute looks for an exact match, instead of looking for the closest match. For example, <voice age=“10”> will only select a ten-year-old voice, or fall back to the default voice if one is not found.

<name>

If you have an onsite system, please contact your sales account manager for which of these voices you have installed on your server.

The following names are supported by their respective engines:

Cepstral Engine
Cepstral Engine

Language

Name

Gender

US

UK

American English (en_us)

David

male

x

x

American English (en_us)

William

male

x

x

American English (en_us)

Diane

female

x

x

Spanish (es_us)

Miguel

male

x

x

Spanish (es_us)

Marta

female

x

x

British English (en_uk)

Lawrence

male

x

x

British English (en_uk)

Millie

female

x

x

French (fr_fr)

Jean-Pierre

male

x

x

French (fr_fr)

Isabelle

female

x

x

German (de_de)

Matthais

male

x

x

German (de_de)

Katrin

female

x

x

Italian (it_it)

Vittoria

female

x

x

If no name is specified, Diane is the default voice for the US Cepstral Engine while Millie is the default voice for the UK Cepstral Engine.

<speak>

The <speak> tag should be used to specify the desired language through the attribute xml:lang=”lg-CN”, where lg-CN is the language-country pair specified in the Language column from the table of supported languages.

Please note that each voice has an associated language. Selecting a language that is not associated with the voice will result in unpredictable behavior; however, in many cases, you will hear the language the text was written in accented by that voice’s associated language.

<voice>

The <voice> tag should be used to specify the desired voice through the attribute name=”name”, where name is the voice specified in the Name/ID column for the table of supported voices.

If another voice is desired, it should specified using the <speak> and <voice> tags as follows within the prompt block:

<?xml version="1.0"?>
<vxml version="2.0">
<form>
<block>
<prompt>
<speak xml:lang="es-MX">
<voice name="Mia" variant="1">
Hello, thank you for calling Plum Voice.
</voice>
</speak>
</prompt>
</block>
</form>
</vxml>

To sequentially use multiple languages and voices within a <prompt> block, use multiple <speak> and <voice> blocks. For example:

<?xml version="1.0"?>
<vxml version="2.0">
<form>
<block>
<prompt>
<speak xml:lang="en-US">
<voice name="Joanna" variant="2">
Press one to continue in English.
</voice>
</speak>
<speak xml:lang="es-US">
<voice name="Lupe" variant="2">
Presione dos para continuar en español.
</voice>
</speak>
<speak xml:lang="fr-FR">
<voice name="Celine" variant="standard">
Appuyez sur trois pour continuer en français.
</voice>
</speak>
</prompt>
</block>
</form>
</vxml>

<xml:lang>

If you have an onsite system, please contact your sales account manager for which of these languages you have installed on your server.

Cepstral Engine
Cepstral Engine

Language

Code Value

US

UK

American English

en_us

x

x

Use <voice xml:lang=“en_us”> to hear an American speaker.

SSML Tags

An “x” marks that the Child Tag is supported by the speech engine. An asterisk (*) means that there are notes to explain the difference between the speech engines.

Child Tag

Cepstral Engine

<break>*

x

<emphasis>

<enumerate>

x

<mark>

<paragraph>*

x

<phoneme>*

<prosody>*

x

<say-as>*

x

<sentence>*

x

<speak>

x

<sub>

x

<value>

x

<break>

The “size” attribute of the break element does not work for this engine.

<paragraph>

The “xml:lang” attribute does not work with the paragraph element.

<phoneme>

Cepstral and RealSpeak Engine:

This element is not supported.

<prosody>

The prosody element works as expected for the Cepstral Engine.

The “pitch” attribute only works for the Cepstral Engine.

Note that you cannot specify the “rate” value as an integer using this engine, but percentages and the preset rates (“fast”, “medium”, “slow”, or “default”) work as expected.

<say-as>

The table below shows the <say-as> tag types and the speech engines that support them. An “x” marks that the <say-as> tag is supported by the speech engine.

Say-as Tag Types

Cepstral Engine

acronym*

x

address

x

number

x

number: cardinal

x

number: ordinal

x

number: digits

x

number: decimal

x

number: fraction

x

number: telephone

x

date

x

date:dmy*

x

date:mdy*

x

date:ymd*

x

date:ym*

x

date:my*

x

date:md*

x

date:dm*

x

date:y*

x

date:m

x

date:d

date:day

digits

duration

duration:h

duration:hm

duration:m

duration:ms

duration:s

measure*

x

name

x

net:email

x

net:uri*

x

time*

x

time:h

time:hm

x

time:hms

spell

telephone*

x

currency*

x

acronym: The acronym tag type works fine in the US, but does not work in the UK.

date:mdy: The preferred format of this tag is “month abbreviation day, year”. For example, to return “December 25, 2001”, you would type “Dec 25, 2001”. You can also use the “month/day/year” format such as “12/25/01” for the US, but this format will not work in the UK.

date:dmy: The preferred format of this tag is “day month abbreviation, year”. For example, to return “December 25, 2001”, you would type “25 Dec, 2001”.

date:ymd: The preferred format for this tag is “year month abbreviation day”. For example, to return “December 25, 2001”, you would type “2001, Dec 25”.

date:my: The format of this tag should be “month abbreviation, year”. For example, to return “December, 2001”, you would type “Dec, 2001”.

date:md: The preferred format for this tag is “month abbreviation day”. For example, to return “December 25”, you would type “Dec 25”. You can also use the “month/day” format such as “12/25” for the US, but this format will not work in the UK.

date:dm: The preferred format for this tag is “day month abbreviation”. For example, to return “December 25”, you would type “25 Dec”.

date:ym: The preferred format for this tag is “year/month”. For example, to return “December 2001”, you would type “2001/12”.

date:y: The date:y tag type works fine in the US, but does not work in the UK.

measure: For Cepstral either the format 5'4“ or 5m will work.

net:uri: For Cepstral, either the format http://www.examplewebsite.com or www.examplewebsite.com can be used.

time: The time tag type works fine in the US, but does not work in the UK.

telephone: The telephone tag type works fine in the US, but does not work in the UK.

The format for telephone numbers is: 123-456-7890

The format for telephone extensions is: 123-456-7890 ext1234

NOTE: Cepstral will read back the last example as, “one two three four five six seven eight nine zero, extension twelve thirty-four.” To account for this, insert commas between the numbers after extension: 123-456-7890 ext1,2,3,4.

currency: When using the say-as type, currency, for AT&T Natural Voices with a Spanish TTS voice, please keep in mind that you will need to format the currency to $<dollar amount>,<cents amount>. The currency amount will not be pronounced correctly if you format it as $<dollar amount>.<cents amount>.

<sentence>

The xml:lang attribute does not work with the sentence element.